LGS5145

{
  "slug": "lgs5145",
  "version": "0.1.0",
  "type": "component",
  "description": "Legend-Si DC-DC Converters, SOT-23-6. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "power supply chip",
    "lgs5145",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "lgs5145.kicad_sym",
    "lgs5145.kicad_mod",
    "lgs5145.glb",
    "lgs5145.step",
    "lgs5145.lbr",
    "docs/hero.png",
    "docs/lgs5145-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "lgs5145-hero.glb",
    "lgs5145-hero.overlay.json",
    "lgs5145-etched.glb"
  ],
  "component": {
    "mpn": "LGS5145",
    "manufacturer": "Legend-Si",
    "package": "SOT-23-6",
    "pin_count": 6,
    "category": "Power Supply Chip",
    "subcategory": "DC-DC Converters",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/dd25d8ceb2a851fa7002bf4d618c8964.pdf",
    "parts": {
      "symbol": "lgs5145.kicad_sym",
      "footprint": "lgs5145.kicad_mod",
      "model_3d": "lgs5145-hero.glb",
      "model_3d_plain": "lgs5145-etched.glb",
      "model_3d_step": "lgs5145-etched.step",
      "model_3d_step_plain": "lgs5145.step",
      "lbr": "lgs5145.lbr"
    },
    "distributor_links": {
      "lcsc": "C5123971"
    },
    "distributor_check": {
      "checked_at": "2026-10-21T02:55:43Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "no match"
      },
      "mouser": {
        "pn": null,
        "status": "no match"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "BST",
        "type": "power_out",
        "description": "Bootstrap gate driver power supply: a high-quality 100nF ceramic capacitor must be connected between BST and SW to bias the internal high-side gate driver, and the capacitor's withstanding voltage must be checked (Pin to GND voltage range is -0.3V to SW+6V)."
      },
      {
        "number": "2",
        "name": "GND",
        "type": "power_in",
        "description": "Ground pin; the datasheet recommends a large copper-clad area for high-current GND paths."
      },
      {
        "number": "3",
        "name": "FB",
        "type": "input",
        "description": "Feedback input connected to an external resistor divider; the internal comparator reference voltage is 0.812V (VFB 0.792V to 0.832V), and the pin is rated -0.3V to 6V to GND."
      },
      {
        "number": "4",
        "name": "EN",
        "type": "input",
        "description": "Regulator enable pin: driving it high enables the output and driving it low turns the regulator off (rising threshold above 1.4V, falling threshold below 1V); it has a weak internal pull-down and should not be left floating, and its voltage rating is the same as VIN."
      },
      {
        "number": "5",
        "name": "VIN",
        "type": "power_in",
        "description": "Regulator power input, recommended operating range 5V to 55V; bypass to GND with a 2.2µF or larger ceramic capacitor placed as close as possible to the pin."
      },
      {
        "number": "6",
        "name": "SW",
        "type": "output",
        "description": "Internal power switching node, connected externally to the power inductor, Schottky diode, and BST capacitor; the pin is rated -0.3V to 60V to GND."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
      "factory_chain": {
        "factory": "2.0.0",
        "extractor": "extract_pins 0.3",
        "primary_model": "claude-haiku-5-5",
        "primary_mode": "text",
        "consensus_model": "claude-sonnet-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: The datasheet gives no KiCad ERC class for BST and SW; the types chosen (power_out for BST, output f; Pin 4 carries footnote (1) in Table 2.2: a 100nA weak pull-down is built in, and the datasheet recom; The package variant is SOT23-6 (6-lead, 0.95mm pitch) per the Tape and Reel table (Device LGS5145, S"
        ],
        "pages_sent": 17,
        "cost_usd": 0.0557,
        "at": "2026-10-21T02:50:41"
      },
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/dd25d8ceb2a851fa7002bf4d618c8964.pdf",
        "pages": 17,
        "sha256": "4986d47d2af14ec7",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 6,
        "described": 6,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "lgs5145.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          2.8,
          2.9,
          1.55
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "c9fe686b4d1b56927a41fa84a9bc1efb61d8a45a123a3db43bcaa05c2891d635",
        "checked": "2026-10-21",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "lgs5145-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          2.8,
          2.9,
          1.55
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "47f9e3c1cd778a00b2288948a95191c8eb455ea52a7c9ca8dea2176cda466e58",
        "checked": "2026-10-21",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}